[Strawbale] Wooden Stove & Windows Insulation
duncan at lithgow-schmidt...
Mon Jan 2 18:55:48 CET 2006
Alice Reite wrote:
> Between the wooden windows and the wooden wall the *best possibel
> material you can choose is sheep wool* (unwashed - buy it directly
> from the farmer). Its wonderfull to work with, it makes it really
> delicious to work!
> By the pipe I would use Leca (expended burnt clay) in a clayplaster,
> or - if you are out of the fireprotected sone I would use the sheep
> wool here too.
I agree with what Reite writes. Leca and Perlite are both virtually
fireproof. Avoid the Leca produced as insulation - it's a big energy
consumer in production. I'd prefer Perlite as a naturally occuring
product with only mining and transport costs to the environment.
Sheeps wool is very good, just make sure you talk with someone local to
check if some anti-insect treatment is needed. People seem to just
plaster over the wool in that last remaining cm or so. I don't
personally think that's a good solution becasue the wood and plaster
will move differently and there will be a crack. Such cracks contribute
greatly to increased air change and cooling of the window frame, and
thus heating costs. I suggest you fix a 3-5mm wooden batton to the
windows frame and plaster up to that. Then pull the wood out later and
fill the gap with something that can expand and contract. Unfortunately
I can only think of synthetic mastics to do that job but it sure saves a
lot of heating...
Maybe someone knows of a natural tar based product, even road tar might
work if it was thick enough to apply from a tube.
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